Pass The Bridge - challenge the black knight to pass a goalThe Green Knight - from the tale of Gawain, overcome a strength based missionDraw the Sword - pull the sword of kings form the stone. Many believe this was Excalibur, but they were different swordsLady of the Lake - claim Excalibur from the Lady

The epic ones...

Holy Grail - maybe an overall goal to find the grailQuesting Beast - perhaps a running side mission to seek the elusive beast

The Beast of Glatisant was rumored to be a strange creature with the head of serpent, the body of leopard, haunches of a lion, and the feed of a hart. The beast is know for a barking sound that eminates from it's belly. The quest to destroy the Beast of Glatisant was undertaken by King Pellinore, Sir Palamedes, and Sir Percival but was never completed.

A castle stood held by seven brothers, anytime a maiden would approch this castle they would be captured and held prisoner in the castle. Any knight errant who approached the castle was challenged and usually defeated as the bothers did not fight fair.

Yes, a bit vague, but no harm in trying (I should say that I'm influenced by Pendragon (1st - 5th Editions) here): are we looking at some sort of boardgame or an RPG (or hybrid)?

The go-betweenA knight and his retinue are required to carry a message from a high-ranking lady to her would-be lover and to return with a reply; could be awkward if the lady's husband gets wind of this and outranks the knight ("What has he got in his pocketses?").

The diplomatA knight is charged by King Arthur with a delicate diplomatic mission to a nearby (or faraway) realm: success means great prestige (and maybe riches); failure means ignominy at least, perhaps a brutal war.

The toe of Saint XYZNot in the same league as the Grail quest, but perhaps it is more "realistic" and easier (although not necessarily easy) to accomplish; maybe there could be someone peddling fake relics (fake to be determined by some in-game system) and if the knight brings back the wrong one, oops!

Ye Olde Judge DreddeA knight could be acting on behalf of the King, sent to a village to resolve a dispute -- something fairly substantial, of course: important land rights, an inheritance, the father of an illegitiate child (who could be heir to a useful property), that sort of thing?

The dream-quest of ...One of the King's spiritual advisors (whatever religion is relevant) has had a bizarre dream and various knights are required to try to make sense of it; clues in the dream could point to a particular region, but after that ...

The Beast of Glatisant was rumored to be a strange creature with the head of serpent, the body of leopard, haunches of a lion, and the feed of a hart. The beast is know for a barking sound that eminates from it's belly. The quest to destroy the Beast of Glatisant was undertaken by King Pellinore, Sir Palamedes, and Sir Percival but was never completed.

A castle stood held by seven brothers, anytime a maiden would approch this castle they would be captured and held prisoner in the castle. Any knight errant who approached the castle was challenged and usually defeated as the bothers did not fight fair.

This is actually out of a historic opus by Crétien de Troyes, Le Chevalier au Lion. Yvain wants do avenge the death of his cousin by an aethereal knight and protector of the forest. To do this, he pours water into a specific stone, which creates a magic storm bringing the knight Esclados de Ros. Yvain defeats the knight, but falls in love with his widow, woos her with the help of her servant, and finally marries her.

This is actually out of a historic opus by Crétien de Troyes, Le Chevalier au Lion. Yvain wants do avenge the death of his cousin by an aethereal knight and protector of the forest. To do this, he pours water into a specific stone, which creates a magic storm bringing the knight Esclados de Ros. Yvain defeats the knight, but falls in love with his widow, woos her with the help of her servant, and finally marries her.

In order to gain the grail the grail quest knights had to find Castle Carbonek.

Sirs Gawain, Hector and Launcelot found Carbonek first but couldn't obtain the grail.

This may be difficult to impliment in a game but the grail quest knights, Sirs Galahad, Percivale and Bors found the grail in Carbonek however...they were destined to find it because they were the chosen knights to find the grail.

In a game, this could maybe be a sub quest or some kind of pre requisite to get to the grail.

The Final Battle on the Plain of Camlann.

Few of the round table knights were left when Mordred and his army fought Arthur and his army. Arthur and Mordred killed each other and the sword Excalibur was returned to the Lady of the Lake by Sir Bedivere.

Return Excalibur to calm water.

Sir Bedivere was tasked with throwing Excalibur into a lake after the final battle. This could be a quest for any living knight too.

Well, as you asked for "Arthurian", this also includes the adventures of other Knights of the Round table. Or so I thought. It is not really a "quest" per se, but so are very few of the actual stories around King Arthur.

What it is, is a story about "justified" revenge (clearing the name of the cousin), and defeating a mythical foe, the Guardian knight of the magical forest Brocéliande.

So it basically was Sir Owain's (Yvains) legend, or part of it. And not King Arthur's, per se. Although few of the stories of the Quest cycle really are - most are concerned with other knights...

Summary: The Philosopher's Stone, possessed by Merlin and used to create Excalibur, is stolen by Mab, Merlin's nemesis. Mab is sister of the Lady of the Lake and a powerful witch and sworn protector of the "Old Ways." Arthur and company need to defeat a powerful Worm (snake-like dragon).

This is a traditional quest which goes beyond the Arthurian legend, and can be found in many legends. The White Stag is said to have mystical powers, and only the bravest, fastest and most dextrous will be able to capture it - if at all. I think it is mentioned in Arthurian legends, as well, but I am not entirely sure. However, it will probably make a good quest for a merry band of knights...

Sir Gawain's Wedding

This is actually a two-part quest. While alone in a forest, King Arthur is threatened by a knight who claims that the land they both are on was once his, but was unlawfully seized by Sir Gawain (nephew to the King). So the King, being in his power, is given the chance to leave, but must return in a years time with either the answer to a question, or he will be slain by the knight.

The King then adresses the problem in Sir Gawain's castle, and they both ride out, to find the answer. King Arthur finds an ugly hag who agrees to tell the answer (because she knows) if Gawain would marry her. Gawain later agrees, and the King returns to the landless knight and wins the challenge.

Gawain marries the old hag and, out of his good heart, willingly fulfills his husbandly "duty", but finds himself in the company of a very beautiful lady instead, who was under a spell, until she was married by a true knight etc.

To sum it up - the Guardian of the Forest could be implemented as a Quest of Honor - or of restoring honor. This is done by a feat of bravery - calling up a mythical creature - and strengh - defeating it.

Afterwards the part of wooing the lady could be a feat of courtly love ("Minne"), and as such, intellect and creativity.

The White Stage would be a feat of endurance (it is a long hunt) and dexterity.

Finally, Gawain's story could be a feat of selflessness and loyalty, as well as a good heart.

All these could be implemented in a game of chivalrous questing in one capacity or the other...

Hunt down and capture a group of witches. Force them to use their powers to seal away an ancient evil that a (now dead) sorcerer conjured. Should they require any special components, you must obtain them yourself.

(This would largely be a series of mini-quests--find the witch hiding at X, capture the witch at Y, find component C, etc. Eventually, the witches could craft a powerful weapon that you use to do battle with the ancient, Lovecraftian-type monster.)

The Sword BridgeIn the French tale of Lancelot entitled "Le Chevalier de La Charette" (The Night of the Cart), Lancelot must cross the Sword Bridge. This bridge is a razor sharp sword blade over an impassable river. Lancelot removes the armor from his hands and feet and steels himself with thoughts of his love Gweneviere (whom he is crossing this bridge to save).

The Isle of the Mists: Avalon features heavily in Arthurian Legend. Perhaps a quest to travel to Avalon and retrieve the waters of the Red Spring and White Spring - both attributed with mystical powers (ie: to heal a fallen comrade?) You could use this as a quest which automatically activates once a player has been killed, (ie: a way to return a player to the game once eliminated). The remaining heroes would need both the spring waters as well as the chalice/grail to complete the quest.

This is a random table that I made, largely derived from Knights of Camelot. Obvious omissions are that it has nothing about the Crusades or the Holy Grail.

The original chart is available for download at the link.

1 A fair lady (or handsome prince) lives in a nearby castle, and is the true love of one of the heroes. The heroes must help the smitten character successfully win their heart.

2 A (roll a d6: 1-2 lady 3-4 aged priest 5-6 mixed group of pilgrims) is/are making a pilgrimage to a nearby shrine, and must be escorted.

3 A fierce beast is terrorising the countryside, and must be hunted. Finding the beast will be as difficult as defeating it.

4 A (roll a d6: 1-2 group of wicked knights 3-4 wicked knight 5-6 good knight who has fallen into madness) is/are terrorising the countryside. They must be challenged and defeated. The knight/s will expertly twist the laws of chivalry against the heroes.

5 A group of bandits are terrorising the countryside, and must be captured or killed. Their cunning in the forest is more dangerous than their skill at arms.

6 An enchantress has bewitched many knights into her service. Her spell must be broken and the knights freed.

7 To prove their courage, the characters must stay at a crossroads, challenging every suitable opponent who travels by (but sparing any who ask for mercy).

8 roll a d6, ignoring this result, or that of courting a fair lady - the resulting adventure is being undertaken as penance.

9 roll a d6, ignoring this result - to get to the resulting adventure, the characters must first journey through a perilous forest.

10 roll a d6, ignoring this result - to get to the resulting adventure, the characters must first take a perilous journey by sea.

11 roll a d6, ignoring this result - the characters are introduced to the adventure by a venerable hermit.

12 roll a d6, ignoring this result - the characters are hunting an animal who speaks to them, telling them of the resulting adventure (optionally roll a d6: the animal is 1-2 a deer 3-4 a unicorn 5-6 a lion).